Electricity and Electrical Safety

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Across
  1. 1. _____ protects against electrical shock.
  2. 4. Cataphoresis closes the _____ , firms the skin, and decreases blood supply.
  3. 8. Direct current always flows in _____ direction.
  4. 9. Advanced electrical machines require an understanding of _____ theory
  5. 12. A wire will _____ if it is not large enough to carry the electrical current passing through it.
  6. 13. An ____ measures the resistance of an electrical current.
  7. 14. Alternating current always flows _____.
  8. 15. moves through space in _____ .
  9. 16. Only _____ of natural sunlight is visible.
  10. 18. Ultraviolet light prompts the skin to produce _____ .
  11. 20. An electrode is used as an _____ for directing electric current from an electrotherapy device to the skin.
Down
  1. 2. _____ light is invisible.
  2. 3. Electrical wiring and electrical motors often use _____ in its wiring because it is a good conductor.
  3. 4. Light therapy is also known as ______ .
  4. 5. E
  5. 6. _____ current is rapid and interrupted current.
  6. 7. _____ rays are associated with nuclear power plants.
  7. 10. The amount of electric energy being used in one second is measured by a _____ .
  8. 11. The _____ of an electrical current are always either positive or negative.
  9. 17. Electricity does not occupy space or have _____ .
  10. 19. Anaphoresis stimulates _____ , softens the skin, and increases blood supply.